What Do E, V, and e Mean in Voltage Symbols?

[Line]

Throughout EE I've seen many symbols. When it comes to voltage I've seen E,V,and e. Do they all mean the same thing?

 

[berkeman]

E is generally used for electric field

V or v is generally used for voltage

e generally refers to an electron or the constant from natural logs

 

[Line]

In the book I've been readinf E means potential difference.

And e was in one about Industion. Eqaution looked something like
L=de/dt

 

[berkeman]

Sounds like your book has problems. What are the title and author of the book? Potential difference is voltage V, and $$E = - \nabla V$$

 

[Valhalla]

E can be used for electromotive force which is equivalent to voltage right?

 

[Averagesupernova]

Picture this:
-
E = 10V
I = 10A
-
Understand?

 

[Line]

Sounds like your book has problems. What are the title and author of the book? Potential difference is voltage V, and $$E = - \nabla V$$

If you're counting V is the actual voltage and Eis the voltage with ground
calculated then $$E=V- \nabla V$$ ...potential difference.

 

[a4swe]

Here we use U for the voltage and sometimes E for the EMK.
We use V to symbolize the potential difference.
e should be the time dependent voltage (of course we use u for that).

 

[berkeman]

If you're counting V is the actual voltage and Eis the voltage with ground
calculated then $$E=V- \nabla V$$ ...potential difference.

Holy smokes, that's totally wrong and misleading. Try putting units into that equation...

 

[Line]

Holy smokes, that's totally wrong and misleading. Try putting units into that equation...

Potential DIfference does eqaul voltage minus the change in voltage doesn't it?

IN my boo E was potential difference, V was voltage and e had to do with induction.

e=N x d(webers)/dt

 

[berkeman]

Potential DIfference does eqaul voltage minus the change in voltage doesn't it?

It can, but that's not what you wrote. There's a big difference between $$\nabla$$ and $$\Delta$$

FYI, $$\Delta$$ can represent a change (as I guess you intended), but $$\nabla$$ is the gradient operator. So the equation $$E = -\nabla V$$ is the way that we usually show the relationship between the vector electric field E and the scalar potential V.

 

[Line]

In the beginning of the book they teach us E as the voltage.

I=E/R

Then in the middle they give us V.

P=VV/R

 

[Ouabache]

E can be used for electromotive force which is equivalent to voltage right?

You are correct, E can be used for http://www.phys.uAlberta.ca/~gingrich/phys395/notes/node8.html .

As Berkeman has also mentioned, E (especially boldface) is also used in electrical engineering for "electric field", so be careful of the context in which you are using these symbols.

In the beginning of the book they teach us E as the voltage.

I=E/R

Then in the middle they give us V.

P=VV/R

So in your book, they are using E interchangably with V for voltage potential. (they are virtually synonymous).

 

[leright]

Sounds to me you have a terrible book, Line.